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Rode the 2014 4-cylinder Streetfighters recently. Fun day and all the bikes are rad. Full notes here: http://www.motorcycle-usa.com/8/1856...-Shootout.aspx
If reading isn't your thing all the video breakdowns are on page 1 and cover each bike pretty well. If you have any more specific questions lemme know. (Also rode the KTM Superduke R recently)
Fun Fact: Only saw death about 25x's that day... crazy fookers.